Which to use
“láser” and “lastra” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #10,171
- “láser” frequency rank
- #37,186
- “lastra” frequency rank
- 47357
- confusion score
Side-by-Side Comparison
| Feature | láser | lastra |
|---|---|---|
| Definition | Dispositivo que utiliza la emisión inducida para generar un haz de luz coherente tanto espacial como temporalmente. | Piedra plana que sale de la cantera en hojas planas y de poco grueso, a manera de tablas. |
Where the eye mixes láser and lastra
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses láser with lastra
A purely visual mix-up. láser ([ˈlaseɾ]) and lastra ([ˈlast̪ɾa]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 47357, derived from the frequency rank of both members and their visual similarity.
láser is recorded at frequency rank #10,171, classified as anoun, pronounced [ˈlaseɾ]. lastra is at rank #37,186, tagged as anoun, pronounced [ˈlast̪ɾa].
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 47357, this pair ranks #120,487 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of láser vs lastra
Shared letters: lrs. Private to "láser": eá. Private to "lastra": at.
"láser" · 5 letters · shape CVCVC · "lastra" · 6 letters · shape CVCCCV
Known mistypes of this pair
- lastra ← alstra · lasrta · lasstra · lastar · lastrra · lasttra · latsra · llastra
Frequently Asked Questions
Is swapping "láser" for "lastra" ever safe?
Frequency check: "láser" vs "lastra" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "láser" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "lastra" - compare definitions side by side with the headword page. Word entry
- This pair ranks #120,487 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "láser" and "lastra" also get mixed up with nearby pairs, the highest-scored neighbour is "labora vs lastra". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #120,487 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.